Typographical composing machines



1962 w. B. ABBOTT ETAL 3,

TYPOGRAPHICAL COMPOSING MACHINES Filed Sept. 23, 1959 INVENTORS WILLIAM B. ABBOTT HERBERT KLEPPER ATTORNEY United States Patent Ice.

3,069,000 TYPOGRAPHICAL COMPOSING MACHINES William B. Abbott, Baldwin, and Herbert Klepper, Brooklyn, N.Y., assignors to Mergenthaler Linotype Company, a corporation of New York Filed Sept. 23, 1959, Ser. No. 841,855 1 Claim. (Cl. 199-56) This invention relates to line casting machines of the general organization, represented in US. Letters Patent to O. Mergenthaler, No. 43 6,532, wherein a type bar or slug is cast in a slotted mold against a composed line of matrices and then forced out of the mold and into a galley by an ejector which advances against the rear edge thereof. As is well known, the mold is removably mounted on a rotatable disk which, during each machine cycle of operation, is first rotated through 90 to carry the mold from the ejecting to the casting position and then through 270 to carry the mold from the casting position back to the ejecting position. Ordinarily, the disk is equipped with four molds, any one of which may be selected for use by a manual rotary adjustment of the casting Wheel.

In order to avoid overheating of the mold in use, it is customary to provide the disk with a liquid cooling system. Such arrangements proposed in the past have, for one reason or another, proven unsatisfactory. For example, in US. Patents No. 977,280 and 1,075,024, the pasageway through which the cooling fluid flows is disposed adjacent the rim of the mold disk. In this position, the fluid does not cool the mold body efliciently because of its distance from the mold body, nor does it cool the mold cap properly since the mold cap is, as is well known, mounted within a mold pocket which is larger than the mold, hence an air space exists between the mold cap and the disk, which space serves to insulate the heated cap from the cooling fluid. In Patent No. 1,596,943, the disadvantages of the above two patents are overcome by providing cooling fluid passageways in the mold cap and mold body themselves. Although such an arrangement leads to more efficient cooling, its use is impractical since each time a mold is replaced the coolant passageways are interrupted necessitating the shutting ofl of the cooling fluid supply and the opening of numerous sealing points. Such interruption is further undesirable due to the leakage of cooling fluid from the dissassembled passageway. All these problems were apparently solved by the British Patents 725,035, and 720,937 (corresponding to copending US. application Serial No. 358,390, now US. Patent No.

3,020,999) wherein the coolant passageways pass through a pair of filling pieces, one disposed between the mold cap and the disk, and the other disposed between the mold body and the disk. However, while this arrangement otters sufficient cooling of the mold, and permits the coolant passageways to remain uninterrupted even when changing molds, a serious deficiency has presented itself. Specifically, since the height of the mold cap has been decreased in order to make room for the filling piece between it and the disk, the thinned-out" mold cap loses some of its rigidity causing it to yield under the high pressure which develops within the mold during casting. This naturally results in the production of an imperfect slug.

The present invention is intended to eliminate all of the above objections and toward that end coolant passageways are provided in the mold disk adjacent the mold cap and the mold body, and the mold cap is so mounted on the mold disk that a relatively large heat transfer area is provided therebetween. In this way, efficient cooling of the mold is insured. Furthermore, the cooling fluid passageways are not interrupted when a mold is removed from the disk, or when mold liners are changed, and the mold cap is sufliciently rigid to resist deformation by the casting pressure.

Other objects and advantages will be apparent from the following description.

In the drawings:

FIGURE 1 is a front elevational view of a mold disk having the present invention incorporated therewith; and

FIGURE '2 is a vertical cross-sectional view taken on line 22 of FIGURE 1.

Referring to the drawings, a rotatable mold disk 10 is shown provided with four mold pockets 11, although the invention is, of course, applicable to disks having a larger or smaller number of pockets. In practice, slug casting molds are inserted in each of these pockets, although in the drawings, only one pocket is shown occupied by a mold. Each mold consists of an upper or cap portion 12, a lower or body portion 13, and two intermediate end pieces or liners 14. The mold disk is formed on its outer periphery, radially outward of the mold pockets, with a gear teeth rim portion 15 by which it is rotated. Radially inward of the mold pockets 11, the mold disk presents a hub portion 16, mounted to rotate on a fixed journal stud 20 secured to the customary mold slide 17.

A continuous channel 24 is cut into the face of the mold disk 10, the channel beginning at the hub portion 16, following a path about the disk face, and terminating at the hub portion right next to the channels point of origin. The path traced out by the groove defines generally two concentric circles, the inner one of which has a radius smaller than the shortest radial distance between the center of the mold disk and the inner edges of the mold pockets 11, while the outer circle has a radius greater than the longest radial distance from the mold disk center to the outer edge of the mold pockets. A long unbroken cooling tube 25, through which the mold cooling fluid flows, is deformed to exactly the same shape as the channel 24 so that it fits properly into the channel. When placed in the channel 24, one end 26 of the tube 25 coincides with the beginning point of the channel, and the other end 27 coincides with the terminating point thereof.

The channel has a depth at least equal to or greater than the diameter of the tube 25 so that the tube may be completely embedded in the web of the mold disk. When the tube has been positioned in the channel, the latter is filled with a metallic filler, such as for example, solder in order to permanently fix the fluid passageway with respect to the disk, to provide a heat flow path, and to make the face of the mold disk flush once again.

The two ends 26 and 27 of the cooling tube 25 communicate through a pair of bores 28 and 29, respectively, located in the hub 16, with two annular areas formed by a pair of peripheral grooves 30 and 31 in the fixed stud 20. Three additional narrower peripheral grooves 32 are formed in the stud 20, one between the grooves 30 and 31 and the other two outwardly of the grooves 30 and 31 on either side thereof. Each of the grooves 32 accommodates a gasket 33 which insures a fluid tight rotary seal between the stud 20 and the hub 16. The grooves 30 and 31 are provided with the ports 36 and 37 respectively, the port 36 opening into a passageway 34, formed in the stud 20 longitudinally thereof, and the port 37 opening into a passageway 35, formed in the stud parallel to the passageway 34. The passageway 34 communicates with a coolant inlet pipe 40 and the passageway 35 communicates with a coolant outlet pipe 41. In practice, the cooling fluid, be it water or oil, is supplied to the inlet pipe 40, flows through the passageway 34 into the annular area formed by the groove 30, from there through the bore 28 in the hub 16, and thence into the tube 25, wherein it picks up the heat of the molds. The fluid leaves the tube 25 via the bore 29 in the hub 16, flows into the annular area formed by the groove 31, and thence through the passageway 35 into the outlet pipe 41. Since the ends of the bores 28 and 29 communicate constantly with the Patented Dec. 18, 1962- (.5 peripheral grooves 30 and 31, the coolant continues to flow even when the mold disk is rotated.

The mold itself, which is mounted for removal in a facewise direction from the mold disk 10, comprises a conventional mold body 13, fastened to the web of the mold disk by four screws 42, a pair of mold liners 14, and the mold cap 12. The mold cap 12 comprises a base portion 12b and an upwardly projecting flange 1241. The base portion 12b is short enough to be accommodated by the mold pocket 11, but on the other hand is made as tall as possible, in order to afford a rigid mold cap construction, and as such the mold cap base, together with the mold body and mold liners, substantially fills the mold pocket. base portion 12b, is disposed in front of and in contact with the mold disk face and extends radially away from the mold disk center. The flange is tall enough to reach beyond the upper edge of the mold pocket, i.e. the edge most remote from the mold disk center, to a point adjacent the rim 15, and the flange therefore overlays the portion of the mold disk face between the mold pocket and the rim. Since a portion of the cooling tube 25 is embedded in this portion of the mold disk close to the face thereof, the mold cap flange is brought very close to the coolant flowing through the cooling tube, thus oflering excellent cooling of the mold cap. Cooling of the mold cap is further aided by the arcuate shape of the top surface of the flange 12a which conforms to the curvature of the mold disk rim 15. This shape provides the optimum heat transfer contact surface between the mold disk face and the mold cap flange. Furthermore, a flange of this shape contains the maximum amount of material for a flange of its height and thickness which does not extend over the gear tooth rim 15, hence the flange substantially increases the rigidity of the mold cap.

The mold cap 12 is fastened to the web of the mold disk by the screws 43 which pass through the elongated slots 44 in the flange 12a and are threaded facewise into the mold disk. The slots 44 permit the cap to be adjusted radially of the mold disk toward and away from the mold body 13 as the point size of the slug to be cast is changed.

The cooling. system and mold cap construction of the present invention therefore, have several advantages. Firstly, since the coolant carrying tube is embedded in the mold disk, the system need not be interrupted when a mold in the pocket of the mold disk is replaced or The flange 12a, which is integral with the' when mold liners are changed. Secondly, since the flange portion of the mold cap is located near the cooling tube and a relatively large heat transfer contact area exists between the flange and the face of the cooled mold disk, proper cooling of the mold is insured. Thirdly, the height of the mold cap base together with the additional material of the mold cap flange, make the mold cap rigid enough to maintain its shape against the high casting pressures.

The invention has been shown and described in preferred form only and by way of example, but many variations and modifications may be made therein and in its mode of application which will still be comprised within its spirit. It is understood, therefore, that the invention is not limited to any specific form or embodiment, except insofar as such limitations are specified in the appended claim.

What is claimed is:

In or for a typographical line casting machine, means for cooling the mold thereof comprising a rotatably mounted disk having a pocket for receiving the mold, said pocket having an arcuate wall adjacent the periphery of the disk, a water conduit embedded in the face of said disk adjacent the said pocket, means including a station ary stud upon which said disk is mounted for providing a water passage to said conduit, and a mold having a body that is flanged to permit attachment of the mold body to the face of said disk and a cap that is flanged to permit attachment of the mold cap to the face of said disk, said cap having a base portion that projects into the pocket formed in the mold disk and is arcuately shaped to conform to the arcuate wall of said pocket, the arrangement being such that the flanged portions of both the body and the cap overlay the water conduit embedded in the face of said disk.

References Cited in the file of this patent UNITED STATES PATENTS Great Britain Mar. 2, 

